A:
Positive:
1 x 4081338855 x 8162677741 x 9954485139 x 2936215205 x 1990897695 x 5872435699 x 7161514323 x 28495
Negative:
-1 x -408133885-5 x -81626777-41 x -9954485-139 x -2936215-205 x -1990897-695 x -587243-5699 x -71615-14323 x -28495
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 408,133,885, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 408,133,885 | |
| -1 | -408,133,885 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 408,133,885.
Example:
1 x 408,133,885 = 408,133,885
and
-1 x -408,133,885 = 408,133,885
Notice both answers equal 408,133,885
With that explanation out of the way, let's continue. Next, we take the number 408,133,885 and divide it by 2:
408,133,885 ÷ 2 = 204,066,942.5
If the quotient is a whole number, then 2 and 204,066,942.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 408,133,885 | |
| -1 | -408,133,885 |
Now, we try dividing 408,133,885 by 3:
408,133,885 ÷ 3 = 136,044,628.3333
If the quotient is a whole number, then 3 and 136,044,628.3333 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 408,133,885 | |
| -1 | -408,133,885 |
Let's try dividing by 4:
408,133,885 ÷ 4 = 102,033,471.25
If the quotient is a whole number, then 4 and 102,033,471.25 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 408,133,885 | |
| -1 | 408,133,885 |
If you did it right, you will end up with this table:
| 1 | 5 | 41 | 139 | 205 | 695 | 5,699 | 14,323 | 28,495 | 71,615 | 587,243 | 1,990,897 | 2,936,215 | 9,954,485 | 81,626,777 | 408,133,885 |
| -1 | -5 | -41 | -139 | -205 | -695 | -5,699 | -14,323 | -28,495 | -71,615 | -587,243 | -1,990,897 | -2,936,215 | -9,954,485 | -81,626,777 | -408,133,885 |
Here are some more numbers to try:
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